/*
* Out Of Memory (OOM) for CPUSET
*
* The program is designed to cope with unpredictable like amount and
* system physical memory, swap size and other VMM technology like KSM,
* memcg, memory hotplug and so on which may affect the OOM
* behaviours. It simply increase the memory consumption 3G each time
* until all the available memory is consumed and OOM is triggered.
*
* Copyright (C) 2010-2017 Red Hat, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
* the GNU General Public License for more details.
*/
#include "config.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#if HAVE_NUMA_H
#include <numa.h>
#endif
#include "numa_helper.h"
#include "mem.h"
#ifdef HAVE_NUMA_V2
static int cpuset_mounted;
static void verify_oom(void)
{
#if __WORDSIZE == 32
tst_brk(TCONF, "test is not designed for 32-bit system.");
#endif
tst_res(TINFO, "OOM on CPUSET...");
testoom(0, 0, ENOMEM, 1);
if (is_numa(NULL, NH_MEMS, 2)) {
/*
* Under NUMA system, the migration of cpuset's memory
* is in charge of cpuset.memory_migrate, we can write
* 1 to cpuset.memory_migrate to enable the migration.
*/
write_cpuset_files(CPATH_NEW, "memory_migrate", "1");
tst_res(TINFO, "OOM on CPUSET with mem migrate:");
testoom(0, 0, ENOMEM, 1);
}
}
static void setup(void)
{
int memnode, ret;
if (!is_numa(NULL, NH_MEMS, 1))
tst_brk(TCONF, "requires NUMA with at least 1 node");
overcommit = get_sys_tune("overcommit_memory");
set_sys_tune("overcommit_memory", 1, 1);
mount_mem("cpuset", "cpuset", NULL, CPATH, CPATH_NEW);
cpuset_mounted = 1;
/*
* Some nodes do not contain memory, so use
* get_allowed_nodes(NH_MEMS) to get a memory
* node. This operation also applies to Non-NUMA
* systems.
*/
ret = get_allowed_nodes(NH_MEMS, 1, &memnode);
if (ret < 0)
tst_brk(TBROK, "Failed to get a memory node "
"using get_allowed_nodes()");
write_cpusets(memnode);
}
static void cleanup(void)
{
if (overcommit != -1)
set_sys_tune("overcommit_memory", overcommit, 0);
if (cpuset_mounted)
umount_mem(CPATH, CPATH_NEW);
}
static struct tst_test test = {
.needs_root = 1,
.forks_child = 1,
.timeout = -1,
.setup = setup,
.cleanup = cleanup,
.test_all = verify_oom,
};
#else
TST_TEST_TCONF(NUMA_ERROR_MSG);
#endif